Interesting. I vil end up with pave or Paris roubaix 27c I think. Have you had 23c on them? I have a lot of Durano plus I would like to get some use out of. Maybe they could mess my winter tires with mudguards. Btw what mudguards and tires are you able to fit in your forks?
BTW, Continental GP 4000sII in 28mm came out nearly 32mm at 80psi on 19mm internal rims.